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Energy & Vitality

Low Energy & Fatigue

Reviewed by the Nimbera editorial team · Last updated May 2026

Persistent tiredness or lack of energy that interferes with daily activities, often linked to lifestyle factors, nutritional deficiencies, or chronic low-grade stress.

When to see a doctor

Seek medical evaluation if fatigue is severe, lasts more than 2 weeks, is accompanied by unexplained weight loss, shortness of breath, chest pain, or if iron deficiency anemia is suspected - these require diagnosis and treatment by a clinician.

Natural remedies · 6

Tap any remedy for the full how-to and citation.

How we rate evidence▾

Strong - Multiple randomised controlled trials or systematic reviews with consistent positive outcomes.

Moderate - At least one RCT or several high-quality observational studies with plausible mechanisms.

Limited - Small trials, animal studies, or traditional use with limited human clinical evidence.

Sources link directly to PubMed, Cochrane Reviews, or NCCIH.

Rhodiola Rosea

ingestible
Multiple RCTs show benefit for mental and physical fatigue but methodological limitations prevent a STRONG rating; NCCIH notes insufficient evidence to draw firm conclusions.
$15-35

Cordyceps Mushroom

ingestible
Small double-blind RCTs in older adults show improved aerobic thresholds; overall evidence base is limited by small sample sizes.
$20-45

Iron-Rich Diet & Iron Deficiency Awareness

lifestyle
Iron deficiency is the most common nutritional cause of fatigue worldwide; NIH ODS and NHLBI provide well-established dietary guidance supported by extensive clinical research.
$0-15

Coenzyme Q10 (CoQ10)

ingestible
Evidence is strongest for statin-related fatigue and mitochondrial conditions; general fatigue evidence in healthy adults is preliminary but biologically plausible.
$20-50

Ashwagandha (KSM-66)

ingestible
Sandhu et al. 2023 RCT (Medicine, PMID 37740662) - 60 adults with chronic fatigue taking KSM-66 ashwagandha 300 mg twice daily for 8 weeks showed significant improvements in fatigue (FSS score) vs placebo (p < 0.001), with improvements in perceived stress, sleep quality, and cortisol levels.
$20-$35/month.

Iron (for Deficiency-Related Fatigue)

ingestible
Barton et al. 2018 review (Cochrane Syst Rev, PMID 29626044) - oral iron supplementation significantly improves fatigue, physical performance, and cognitive function in women with iron deficiency (with or without anaemia). Effect size is large; results emerge within 4-8 weeks of treatment.
$10-$30/month depending on form.

More in Energy & Vitality

Chronic Fatigue Syndrome

4 remedies

Remedy information is compiled from primary clinical sources including PubMed, the Cochrane Library, and the National Center for Complementary and Integrative Health (NCCIH). Evidence ratings reflect published human trial data at time of writing. This content is for informational purposes only and is not a substitute for professional medical advice. Read our full disclaimer.